Has anyone tested the new crop of test/alignment LPs against the old RCA test records?
What I was always told by guys who actually did professional mastering in the LP era exactly matches
what Bob said -- after 1954, everyone aligned to the RCA record, which was the RIAA curve (since the
RIAA adopted RCA's New Orthophonic curve as the standard). Bob, do you know if RCA put out a stereo
test record later on? If I recall correctly, CBS Labs did.
-- Tom Fine
----- Original Message -----
From: "Bob Olhsson" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, September 09, 2009 10:47 AM
Subject: Re: [ARSCLIST] Non-RIAA curves for stereo LPs????
> -----Original Message-----
> From Michael Biel:
> ... He stressed that digital equalization is
> not at all the same as analog equalization, and since the RIAA
> pre-emphasis had been done in analog, the de-emphasis must also be done
> in analog.
This is one of those oversimplified generalizations that isn't really true.
I would never trust any analog or digital de-emphasis to be accurate without testing however both
can be done with a proper implementation. Virtually all cutting systems were calibrated to match the
playback of an RCA test record that had been equalized for flat playback response. This is the gold
standard to match precisely what we mastering engineers believed we were recording on the disk.
Bob Olhsson Audio Mastery, Nashville TN
Mastering, Audio for Picture, Mix Evaluation and Quality Control
Over 40 years making people sound better than they ever imagined!
615.385.8051 http://www.hyperback.com http://www.thewombforums.com
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